Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d392fb7560afc93…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 20:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-14
MD5: 52a921c0ecf128bd4b201609535e2861 SHA-1: c368bd31b5fdded0b1da766e90fef96ef2121f5c SHA-256: 0d392fb7560afc93af56f2770a90eb03f040a4d8508b91286d6bf8d48652b790
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/free-redeem-code-for-coin-master-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-video-files-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-jailbreak-roblox-money-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-how-to-be-a-nerd-no-robux-no-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-add-cheats-to-a-roblox-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-easy-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-o-use-cheat-engine-in-roblox-tycoon_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-versus-pc_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-u-unlock-the-roblox-account-pin-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/boss-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CF 22956 bytes
SHA-256: b60fd729102ec8ae37fcca3ab1fd936de1e78727c7decf50eb6633323dbf1ad4
font_01_sfnt_off00006779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 18432 bytes
SHA-256: c861c688303d0ce30a75b450dc2e1ce34b57c54574c870d49b8c2c1412c8bb94

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